I'd like to add a backhoe to my Ford/NH 1920. Had found a great deal on a wallenstein GX700 and was ready to buy when I was told there was no sub frame mount available. My questions are 1) how important is the subframe mount? 2) has anyone had experience with the GX700??? 3) Any reccomendations on other backhoe manufactures??? This is my first tractor and i'd like to do it right